Improvement in blind-slat tenoning-machines



- anatema aaai @um `rimannonetas, orY Nonwicn, coNNnoTIcUT.

I Y 3 Letters Patent No. 107,671',- dated S'eptember'27, 1870.

IM'PRovEM'r-:NT |N BuND-sLAT TEN'oNlNeFMAcHmEs.

The Schedule referred. to in these Letters Patent and making pai't of the same NIQFRANK DoUGLAsgof Norwich, in the county of NewLondon and State of Connecticut, have invented certain Improvements in `Blind-Slat 'lenoning-Machins-and Blind-stileBoring-Machines, of which the following is a specification.

The .natureof my invention consists in providing a machine for cutting ,blind-slatsto'a given length, and

` sliapingor forming round tenons thereon, with great i rapldity, and in such a manner that the operator has simply to feed theslatestrips to thel machine, in any lengths, as fast as he can conveniently handle lthem, and they are cut to exact lengths, tenoned on both4 ends, anddropped "under the machine in ainishedy state. Y f i It consists, also, in attaching to the same machine an. improved device for boring blind-Stiles, vwhich makesthem exact duplicates, ina very easy an'drapid 2 man neit i f A; is the name 0f chills-M" i Y y Y l Figure 2 is aisect-ionalvview of one of the large `disks cnt through the center, showing the feed-shaft lfiglirel` is a perspectiveview of thefentire ma- Figure 3 is a sectional view of the cutter-head, with `b itfshaftand socket. y

Figure 4V is a `cross-'section of the boring attach.- ment. l

V the machine, which `shouldbe substantially constructed, so as tohold all the working parts in true and perfect line. `Bris the counter-shaft.

y C C, the pulleys that drive the mittel-heads l) D, the cutter-heads.

E E, the large rotating disks, in which are placed,

. atcqual distancesapart, four small rotating disks, e e

Thedisk-frames FF are ,nicely fitted to .the frame A, so asito retain their true line with th machine while `being adj usted cndwise, and are yturned ont true inside, for the receptionof large disks E E, which are heldin placeby circul'ar platesa a, that tit over the projecting edges of disks E E. i

i kThe large disks have four openings 'in each, entend- `mg luto `the opening for the small disks, and corre- `spending somewhat `in size to the openings in theframes F F, which allow the operator to slide the slats `to beworked from the rests G G into the centers of the 'small disks e e e e.

These small disks have in each an vopen parallel slot, x, the `thicknessof thethickest blind-slet, and

extending nearly` across it, or far enough to admit the centerof the widest slats `in common use to the een` ter of said disk.` t i 4 i The depth that the slat is admitted into this disk is governed by the adjustable stop b, which is so con-v structed vthat it may be set on a suiiicient angle with slot x in said disk to force the back upper edge of the y On this shaft are `four segment-gears, two of which,

J J, mesh into -the cogs on the projecting edges ot' the large disks E E, and, at each revolution of the feed-shaft H, the said large disks E E are moved one. fourth of a revolution, which brings one of the openings on the edge of each disk E E in line with the openings inthe disk-frames F F, ,the rests G G, and the openings or slots xx in the small disks, where they are held, by the spring stops K K, for the re ception of the slats to be tenoned, until they are moved forward one-fourth of 'a revolution further by the next revolution of the shaft H. The stops K K are thrown ont by the pressure from the sides of the segment-gears' `J J, while said gears are in contact wit-h the cogs'on the large disks, to allow the said disks to move around one-fourtlrof arevolution, where they are again held by the said stops during the re mainder of the revolution o f the feed-shaft. 'lhe two otherr segment-gears L L upon the shaft H are so arranged as to give one revolution to theA two small-disks, 'e e, which are nearest -the feed-shaft H, while the large disks E E are at rest, andthe feedshaftismakng the'remainder of its revolution.

Secured to the disks e e e e, to hold themin place, are circle-plates m m m in., in the edge of each of which there is a notch, to receive thespring'stops nu u n, which stops hold the openings a: 'x x t of' the small `disks in line with the openings in the large disks, at

all times, except when the small disks are making their revolution to form the round tenons on the slat.

`After the slat is tenoned, and while the flarge disks are making another fourth of a revolution, one of the pins o o o o, in each disk E E, strikes the lower end of levers P l, and tilts them on pivots Q Q, which brings the other end ofthe levers I? l down upon the inner edge of the slat'last tenoned, and forces it outv of the disks, under the machine, in a finished state. The springs V V, attached to the lower ends of levers I 1),'then tilt them back, after the pins o o pass them, ready for the next slat.

.'lhe cutter-head, as shown in fig. 3, (which is a seev tional view of the cutter-head cut through o n line 2,'

Iig. 1,) is made with a dat circular` plate, R, attached to which are four right-,angle cutters, lr r rr 1'.

These cutters are held firmly in iiat radial grooves the depth of the thickness ot' cutter-Shanks in one side of plate 1t. The cutting-,edges of critters a' a' fr lr are about the length ot' tenori to be cut and project across the edge or face of plate R.

Depressions are made in the edge ot' plate It, under each cut-ter, to allow the chips cut from the slat to pass directly under each of said cutters, between them and the plate, making a smoother and better cut than can be made bya saw-tooth or a cutter-head that carries the chips ahead of or with the cutters. The saw S is for cutting the tenons to the proper length.

'lhe spur-plate t may have knife or saw-spurs on its edge, for cutting a smooth shoulder, thel same as has been used vfor many years on tenoning-machines of all kinds.

The saw S, plate 1t, with cutters fr 'r 'r r, and spurplate t, when clamped on a shaft between two'collars, are designated as cutter-head D.

The arbors of cutter-heads D D run in suitable bearings in frames L T, which are so arranged as to beadjustable endwise with ,the machine, for gauging the length ot' the slats, and crosswise of the machine for gauging the size of the tenon required. e

'lhe bit-socket 1, .for boring the blind-stiles, is made to slide out and .in on theprojecting end of cutter-head shaft D', and is turned by the feather 2,

. in said shaft.

The-loose collar 3 is provided with trunnions, upon which Athe forked end of the lever '4, to ,which the treadle is,l attached, acts for moving the' bit in and out.4

lhe. belt from one of the pulleys C, which passes over the small vpulley on the shaft of cutter-head D', drives both the cutter-head and the bit.

A The bed-piece 5, ot' the boring attachment, is adjustable up'and down in the brackets 6 6.

Upon this bodpiece 5 is the sliding bed, 7, so gibbed and litt'ed asito hold it in its plaee, but admits of a` iree movementendwise.

Attached to one end of bed 7 is a T-shaped step, against which the end of the mortise in the stick to be Vbored is placed. Said stick is held down with thc eccentriclevers 8 S.

. After having `bored one stile, it is placed on the outside of thesliding bed 7, with the shoulder of the mortiseagaiust the saidv T-gauge, and is held in place by set-screws 9 9, and serves as a pattern to bore otlif ers of the same size, which is accomplished in the following manner:

On the outside, attached to the bed-piece 5, with its point in line with the bit, there is alspring-stop, 10, which falls into each hole in the piece clamped on the sliding ned 7, for a pattern, and holds it in place while the bit is boring corresponding holes in the stile to he bored. In this manncran indefinite number of stiles may he bored with rapidity, to corbc tenoned, (which may be ot' any length) on the rests G G, and, when the openings iu the large disks come around iu line with said rests, (where they make a slight stop,) the slat is entered tothe center of the small disks, where it brings up aga-inst the gaugestops b b, and is held firmly in place by the springs (1 (l.

'lhe large disks are now moved one-fourth of a revolution, when another slat is entered, and when the large disks have moved one-half of arevolution, the slat lfirst entered has made its nearest approach to the cutter-heads, where the segment-gears L L mesh into the cogs on the small disks c e, and cause them to make one revolution on their own axis. This produces a round teuou on each end ofthe slat, and cuts it to its proper length, at the same time that another slat is being entered fromvthe rests G G; and, while the large disks are making another fourth of a revolution, the last slat finished is carried away from the cutter-heads, and thrown out of the disks under the machine, by the levers P P, the operator having nothing to do but to feed the slatsto the machine as fast as the openings in the large disks E E present themselves in line with the rests G G.

The cutter-heads being located eccentrically with the large disks from the side in which the slats are entered, the said slats do not come in contact with the cutter-heads until they have been placed in the centers of the small disks, and held there rmiy while being carried around in Contact ivith the cutter-heads, which makes the shoulders'true and smooth.

The importance of entering the slats to the centers of the small disks, without coming in contact with the cutter-heads while entering, is easily understood, it is impossible for anyone to7euter them at both ends exactly at 4the sa'me time, and in line with the cutters, and, it' not, the shoulders of the tenons are cut out ot' true in the same proportion as they are entered out of true.

tionary frames, into which the slats are entered in contact withclusters of saws, which cnt one side of the tenons while entering, as that is claimed by Seth O.,Ellis, in his patent of February 3, 1857.

C latins.

I claim as my inventionl 1. The disks E E, in combination with frames F F, disks c e e c, segment-gears J J and L L, all con- Ystructed and operated in the manner and for the purpose herein specified.

2. The spring stops K K, when constructed as described, and operated by segments J J, for the purpose herein specified. y

3. The pins o o o o, in combination with disks E E and levers P P, for the purpose of throwing the finished slats ont of disks e c c c, substantially as herein specified.

4. The mechanism for centering the blind-Slat, consisting Iof stop b, spring d, parallel slot rv, and disk c, all constructed and operating substantially in the manner and for the purpose herein specied.

5. The combination ot' saw S, plate R, cutters r fr lr r, and spur-plate t, when constructed substantially as and for the purpose speciiied. v

6. The bit-socket 1, when constructed and operated substantially as shown and described.

7. The spring stop 10, in combination with beds 5 and 7 when constructed and operated substantially as described.

. FRANK DOUGLAS.

Witnesses ALBERT L. Bonnes, G. H. DOUGLAS.

I do not claim a single pairof` rotating disks in sta--v 

